US11179783B2 - Quick changeable collet clamping assembly - Google Patents
Quick changeable collet clamping assembly Download PDFInfo
- Publication number
- US11179783B2 US11179783B2 US16/361,774 US201916361774A US11179783B2 US 11179783 B2 US11179783 B2 US 11179783B2 US 201916361774 A US201916361774 A US 201916361774A US 11179783 B2 US11179783 B2 US 11179783B2
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- US
- United States
- Prior art keywords
- collet
- expansion sleeve
- axial
- sleeve
- draw pin
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B31/00—Chucks; Expansion mandrels; Adaptations thereof for remote control
- B23B31/02—Chucks
- B23B31/10—Chucks characterised by the retaining or gripping devices or their immediate operating means
- B23B31/12—Chucks with simultaneously-acting jaws, whether or not also individually adjustable
- B23B31/20—Longitudinally-split sleeves, e.g. collet chucks
- B23B31/201—Characterized by features relating primarily to remote control of the gripping means
- B23B31/207—Characterized by features relating primarily to remote control of the gripping means using mechanical transmission through the spindle
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B31/00—Chucks; Expansion mandrels; Adaptations thereof for remote control
- B23B31/02—Chucks
- B23B31/10—Chucks characterised by the retaining or gripping devices or their immediate operating means
- B23B31/12—Chucks with simultaneously-acting jaws, whether or not also individually adjustable
- B23B31/20—Longitudinally-split sleeves, e.g. collet chucks
- B23B31/201—Characterized by features relating primarily to remote control of the gripping means
- B23B31/207—Characterized by features relating primarily to remote control of the gripping means using mechanical transmission through the spindle
- B23B31/2073—Axially fixed cam, moving jaws
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B31/00—Chucks; Expansion mandrels; Adaptations thereof for remote control
- B23B31/02—Chucks
- B23B31/10—Chucks characterised by the retaining or gripping devices or their immediate operating means
- B23B31/117—Retention by friction only, e.g. using springs, resilient sleeves, tapers
- B23B31/1177—Retention by friction only, e.g. using springs, resilient sleeves, tapers using resilient metallic rings or sleeves
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B31/00—Chucks; Expansion mandrels; Adaptations thereof for remote control
- B23B31/40—Expansion mandrels
- B23B31/4006—Gripping the work or tool by a split sleeve
- B23B31/4033—Gripping the work or tool by a split sleeve using mechanical transmission through the spindle
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B31/00—Chucks; Expansion mandrels; Adaptations thereof for remote control
- B23B31/40—Expansion mandrels
- B23B31/404—Gripping the work or tool by jaws moving radially controlled by conical surfaces
- B23B31/4066—Gripping the work or tool by jaws moving radially controlled by conical surfaces using mechanical transmission through the spindle
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B2231/00—Details of chucks, toolholder shanks or tool shanks
- B23B2231/20—Collet chucks
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B2231/00—Details of chucks, toolholder shanks or tool shanks
- B23B2231/20—Collet chucks
- B23B2231/2089—Slits of collets
- B23B2231/2091—Slits of collets extending from both axial ends of the collet
Definitions
- the present invention relates to a manual and/or automatic quick-change clamping assembly for releasably securing a collet to a turning machine or any other type of machine tool, and is more particularly related to a clamping assembly having a collet adapter with an expansion sleeve removably disposed therein and having a clamping portion thereon and with a draw pin extending through a bore in the expansion sleeve so that a portion of the draw pin engages the expansion sleeve causing radially outward movement of the clamping portion in response to axial displacement of the draw pin relative to the expansion sleeve, to releasably secure a collet in the collet adapter.
- the present invention is further directed to an extraction tool for removing the collet from the clamping assembly.
- a collet is a device having two or more “jaws” between which an object such as a tool or a workpiece can be positioned.
- the jaws form a collar around the object.
- the jaws of the collet are configured to constrict around the object by deflecting radially inward.
- the jaws may be deflected radially inward by pushing a suitable mechanism (e.g., a collet adapter) around the circumference of the collet.
- a suitable mechanism e.g., a collet adapter
- the collet is tapered and drawn into a sleeve (e.g., a collet adapter) by a draw bar to cause the jaws to constrict around the tool or workpiece.
- Collets are typically fabricated from steel, which allows the jaws to be sufficiently flexible relative to each other to allow the jaws to flex and hold the tool or workpiece.
- the collet is held in a clamping device (e.g., a collet adapter and draw bar), which is connected to a shaft that can be rotated, which in turn causes the tool or the workpiece to rotate.
- a clamping device e.g., a collet adapter and draw bar
- the tool is made to engage or be engaged by a workpiece.
- the workpiece engages or is engaged by a tool.
- the rotational accuracy of the tool or the workpiece affects the process of removing swarf (e.g., metal chips) from the workpiece.
- swarf e.g., metal chips
- the rotational accuracy of the tool or the workpiece is typically a function of concentricity along the axis of rotation.
- the concentricity achieved with mechanical clamping is often inadequate or compromised during rotation, thereby resulting in run-out. Such run-out can detrimentally affect the finished workpiece.
- Multiple cycles of operation of the pulling device can cause the concentricity to change for each cycle, thereby causing an inconsistent and unacceptable run-out accuracy.
- the collet is removably attached to the draw bar by a suitable fastener.
- a suitable fastener there is typically a gap on the guiding diameter between the collet and the collet adapter.
- This gap causes variation of concentricity between the collet and the rotation axis due to different reasons, such as variation of friction in the clamping system of the machine tool, variation of clamping force, such as pressure, direction, pulsation, vibrations, machining forces or other external influences on the tool or the workpiece, different angular orientation of the spindle between different clamping cycles, influence of dust, chips, wear and temperature.
- a clamping assembly for releasably clamping a collet.
- the clamping assembly includes a collet adapter and an expansion sleeve movably disposed in collet adapter.
- the clamping assembly includes a draw pin movably disposed in the expansion sleeve.
- the expansion sleeve cooperates with the draw pin to define a containment system configured maintain the expansion sleeve within an axial envelope and a radial envelope within the collet adapter.
- Axial movement of the draw pin in the expansion sleeve within the axial envelope causes a portion of the expansion sleeve to expand radially outward to a predetermined maximum diameter to releasably clamp the collet in the collet adapter.
- the expansion sleeve ( 400 ) includes two or more slots each of which extend along an axial length of the expansion sleeve and extend axially inward from the first end ( 401 ) and/or the second end ( 408 ).
- the clamping portion ( 403 ) includes a first axial leg ( 413 A, 413 B) and a second axial leg ( 413 C, 413 D).
- the first axial leg and the second axial leg are separated circumferentially by a first axial slot ( 412 ) and a second axial slot ( 412 ).
- Each of the first axial slot and the second axial slot extend axially inward from the first end ( 401 ).
- the first axial slot and the second axial slot impart flexibility to the clamping portion ( 403 ) so that the first axial leg and the second axial leg flex radially in response to the axial displacement of the draw pin ( 300 ) relative to the expansion sleeve ( 400 ).
- the clamping portion ( 403 ) includes a tapered surface.
- the expansion sleeve ( 400 ) includes a third axial leg ( 414 A, 414 B) and a fourth axial leg ( 414 C, 414 D).
- the third axial leg and the fourth axial leg are separated circumferentially by a third axial slot ( 411 ) and a fourth axial slot ( 411 ).
- Each of the third axial slot and the fourth axial slot extend axially inward from the second end ( 408 ).
- the third axial slot and the fourth axial slot impart flexibility to the expansion sleeve ( 400 ) so that the third axial leg and the fourth axial leg flex radially in response to the axial displacement of the draw pin ( 300 ) relative to the expansion sleeve ( 400 ).
- the collet adapter includes a first containment feature and the expansion sleeve includes a second containment feature.
- the first containment feature engages the second containment feature to releasably contain the expansion sleeve in the first bore and to limit axial movement of the expansion sleeve in the first bore to a predetermined distance ( 603 L).
- the first containment feature includes a circumferential groove ( 603 ) extending radially outward from the interior surface ( 601 ) to a depth ( 603 D) and the second containment feature comprises a circumferential tab ( 406 ) that extends radially outward from the expansion sleeve a height ( 406 H) to limit radial expansion of a portion of the expansion sleeve to a predetermine magnitude established to prevent plastic deformation of the expansion sleeve.
- the circumferential groove ( 603 ) includes a first taper ( 604 ) on a side thereof to facilitate installation and removal of the expansion sleeve in the collet adapter.
- the circumferential tab ( 406 ) includes a second taper ( 405 ) to facilitate installation and removal of the expansion sleeve in the collet adapter.
- the draw pin ( 300 ) includes a taper ( 305 ) on the second exterior surface.
- the taper is configured to urge the clamping portion ( 403 ) radially outward to secure the collet in the collet adapter.
- the draw pin ( 300 ) includes a circumferential shoulder ( 306 ) on the second exterior surface to retain the clamping portion ( 403 ) radially outward to secure the collet in the collet adapter.
- one of the first axial slot ( 412 ) and the second axial slot ( 412 ) extend into one of the third axial leg ( 414 A, 414 B) and the fourth axial leg ( 414 C, 414 D). In one embodiment, one of the third axial slot ( 411 ) and the fourth axial slot ( 411 ) extend into one of the first axial leg ( 413 A, 413 B) and the second axial leg ( 413 C, 413 D).
- a collet extraction tool for extracting a collet from a collet adapter, the extraction tool including one or more latches ( 701 ) for releasably grasping the collet.
- the collet extraction tool is a castellated tube having two or more legs ( 703 L) that extend from a ring ( 703 R) portion of the tube. Adjacent pairs of the legs are spaced apart by a respective slot ( 703 ).
- the latch includes a circumferential groove ( 701 G) that extends around an inner surface of the tube. The circumferential groove is configured to receive a lip ( 509 L) extending around an exterior surface of the collet.
- the groove ( 701 ) has one or more axial lands ( 702 ) configured to engage a portion of the collet. Any of the foregoing embodiments may be combined.
- FIG. 1 is a perspective view of the clamping assembly of the present invention shown in the clamped position with the collet, the collet adapter and the draw bar;
- FIG. 2 is a perspective view of the clamping assembly of FIG. 1 an extracting position with a collet clamped therein, a draw bar connected thereto and a collet extraction tool arranged to extract the collet from the collet adapter;
- FIG. 3 is a cross sectional view of the clamping assembly of FIG. 1 shown in the extracting position with a collet, a collet adapter, a draw bar, a draw pin, an expansion sleeve and the collet extraction tool;
- FIG. 4A is a cross sectional view of the clamping assembly of FIG. 1 shown in the clamping position with the collet, the collet adapter, the draw bar, the draw pin and the expansion sleeve;
- FIG. 4B is a cross sectional view of the clamping assembly of FIG. 1 shown in the clamping position with the collet, the collet adapter, the draw bar, the draw pin and the expansion sleeve;
- FIG. 5 is a cross sectional view of the clamping assembly of FIG. 1 shown in the unclamped position with the collet, the collet adapter, the draw bar, the draw pin and the expansion sleeve;
- FIG. 6 is a cross sectional view of the clamping assembly of FIG. 1 shown in an empty clamped position with the collet adapter, the draw bar, the draw pin and the expansion sleeve, but with the collet removed;
- FIG. 7A is a perspective view of the draw pin
- FIG. 7B is a cross sectional view of the draw pin
- FIG. 8 is a perspective view of the expansion sleeve
- FIG. 9 is a perspective view of the collet
- FIG. 10 is a perspective view of the collet extraction tool
- FIG. 11A is an enlarged view of FIG. 5 illustrating the unclamped position
- FIG. 11B is an enlarged view of FIG. 4A illustrating the clamped position.
- FIGS. 1-3 some embodiments of the present disclosure are directed to a clamping assembly 100 including a draw bar 200 , an expansion sleeve 400 , a collet 500 , and a collet adapter 600 .
- FIG. 1 shows collet assembly 100 in a clamped position in which a clamping force is exerted on the collet 500 to hold the collet within the collet adapter 600 .
- FIGS. 2 and 3 show the collet assembly 100 in an extracting position, where a collet extractor 700 is used to remove the collet 500 from the collet adapter 600 , as is discussed in greater detail herein.
- the clamping assembly 100 does not employ any coil springs.
- the draw bar 200 includes a draw bar mounting portion 201 for connection to a translation device (not shown).
- the translation device is configured and positioned to provide an axial movement force, rotational movement force, or combinations thereof to the draw bar 200 .
- the axial movement forces can be pushing forces or pulling forces. Axial pulling forces result in clamping of the collet 500 in place within clamping assembly 100 . Similarly, axial pushing forces result in unclamping of the collet 500 , enabling easier removal than when in the clamped position.
- the draw bar 200 includes a draw bar coupling portion 202 for connection with a draw pin 300 .
- a draw bar end face 203 is disposed axially opposite the draw bar mounting portion 201 .
- the draw bar end face 203 is positioned to provide axial movement during unclamping.
- the draw bar 200 includes a draw bar hex 204 positioned to enable easier application of rotation forces upon the draw bar 200 , e.g., to tighten the draw bar 200 into or remove the draw bar 200 from the translation device.
- the draw pin 300 includes an exterior surface ( 301 , 302 , 303 , 304 , 305 , 306 , 307 , 308 , and 311 ).
- the draw pin 300 includes a draw pin coupling portion 301 .
- the draw pin coupling portion 301 is configured to interface with the draw bar mounting portion 202 and fixedly hold the draw bar 200 and draw pin 300 together.
- the draw pin coupling portion 301 and the draw bar mounting portion 202 have complementary threaded areas.
- the draw pin includes a first draw pin face 302 , which interfaces with the draw bar end face 203 .
- axial pushing movement of the draw bar 200 is transmitted via the draw bar face 203 to the first draw pin face 302 , resulting in axial pushing movement of the draw pin 300 .
- first guiding diameter 303 there is a first guiding diameter 303 , a draw pin groove 304 , a draw pin taper 305 , a circumferential shoulder 306 , and a third guiding diameter 308 .
- a second draw pin face 307 is positioned between the circumferential shoulder 306 and the third guiding diameter 308 .
- the third guiding diameter 308 helps maintain concentricity between the draw pin 300 and the collet 500 .
- the draw pin 300 includes a draw pin hexagonal shaped bore 309 extending into the draw pin 300 and positioned to receive a hexagonal shaped male driver to enable application of rotation forces upon the draw pin 300 , e.g., to tighten the draw pin 300 into or remove the draw pin 300 from the draw bar 200 .
- the draw pin 300 includes a draw pin thread 310 that allows fixation of an end stop for a workpiece.
- a draw pin end face 311 is disposed axially opposite the draw pin coupling portion 301 . The draw pin end face 311 is positioned to eject a workpiece, as is discussed in greater detail herein.
- the collet adapter 600 includes a hollow body having a draw bar receiving end 600 A, a collet loading end 600 C, and a first bore 600 B disposed therebetween, each concentric about the longitudinal axis A.
- the collet adapter 600 joins the collet 500 to a machine spindle, as well as keeps an expansion sleeve 400 in a predetermined position.
- the collet adapter 600 includes a first inner surface defined by first adapter guiding diameter 601 , groove stop face 602 , circumferential groove 603 , first taper 604 , adapter guiding diameter 606 , adapter lead-in taper 607 , clamping taper 609 , and adapter lead-in diameter 610 .
- the first adapter guiding diameter 601 , adapter guiding diameter 606 , clamping taper 609 , and adapter lead-in diameter 610 are positioned and configured to center other components of clamping assembly 100 , e.g., the expansion sleeve 400 , the collet 500 , etc.
- the adapter lead-in taper 607 prevents frontal collision between the collet 500 and the collet adapter 600 while loading the collet 500 .
- the adapter guiding diameter 606 is sized and configured to receive collet 500 as is deflected by a clamping force.
- the adapter guiding diameter 606 also helps maintain concentricity of the collet 500 and the draw bar 200 .
- the circumferential groove 603 has a depth 603 D and a length 603 L, and is sized and configured to receive the expansion sleeve 400 as is discussed in greater detail herein.
- the collet adapter 600 includes a mounting portion 605 for joining the clamping assembly 100 to the machine spindle.
- the collet adapter 600 includes an orientation pin ( 608 ), sized and configured to consistently orient the collet 500 and prevent rotational movement thereof, as is discussed in greater detail herein.
- the expansion sleeve 400 includes a first end 401 which is located axially opposite a second end 408 with a second bore 400 B therebetween.
- the first end includes a lead-in taper 410 , which enables easier loading of the collet 500 by limiting frontal collision (e.g., contact or engagement) between the collet 500 and the expansion sleeve 400 , as is discussed in greater detail herein.
- the first end 401 is positioned to interface with second draw pin face 307 .
- the expansion sleeve 400 is a flexible member that includes an interior surface including interior surfaces 402 and 409 and an exterior surface including a clamping portion 403 , flange extraction face 404 , second taper 405 , circumferential tab 406 , flange stop face 407 , and sleeve lead-in taper 410 .
- the interior surfaces 402 and 409 are configured to interface with the draw pin 300 and maintain concentricity therewith.
- the first guiding diameter 303 prevents the interior surface 409 from collapsing at the second end 408 .
- the circumferential shoulder 306 prevents the interior surface 402 from collapsing at the first end 401 .
- the circumferential shoulder 306 is moved beyond the first end 401 , which is instead aligned with the draw pin groove 304 .
- the reduced diameter of the draw pin groove 304 allows the expansion sleeve to collapse at the first end 401 , enabling easier application or removal of a collet 500 from the first end 401 .
- the draw pin taper 305 guides the expansion of the first end 401 back to the circumferential shoulder 306 .
- the circumferential tab 406 is positioned within the circumferential groove 603 in the collet adapter 600 .
- the interaction between the circumferential tab 406 and the circumferential groove 603 maintains the expansion sleeve 400 within the same general axial position within the first bore 600 B, and further prevents the expansion sleeve 400 from radial over-expansion.
- the first guiding diameter 303 acts to maintain the circumferential tab 406 within the circumferential groove 603 .
- the circumferential tab 406 has a length 406 L and a height 406 H, and includes the flange stop face 407 , the second taper 405 , and the flange extraction face 404 .
- the flange stop face 407 is positioned to interface with the groove stop face 602 .
- the flange stop face 407 limits axial pulling movement of the expansion sleeve 400 and also prevents damage to collet 500 via this limited movement.
- the second taper 405 is positioned to interface with the first taper 604 .
- the second taper 405 limits axial pushing movement of the expansion sleeve 400 .
- the expansion sleeve 400 cooperates with the draw pin 300 to define a containment system configured maintain the expansion sleeve 400 within an axial envelope and a radial envelope within the collet adapter 600 .
- the axial envelope is defined by the length 406 L of the circumferential tab 406 and axial length 603 L of the circumferential groove 603 .
- the radial envelope is defined by the height 406 H of the circumferential tab 406 the radial expansion thereof being limited by the depth 603 D of the circumferential groove 603 .
- Axial movement of the draw pin 300 in the expansion sleeve within the axial envelope causes a portion of the expansion sleeve 400 (e.g., axial legs 413 A, 413 B, 413 C and 413 D) to expand radially outward to a predetermined maximum diameter to releasably clamp the collet 500 in the collet adapter 600 .
- the expansion sleeve 400 can collapse radially and the second taper 405 helps guide the now reduced diameter circumferential tab 406 around the first taper 604 for easier removal from the collet adapter 600 .
- the flange extraction face 404 acts to detach the collet 500 during unclamping via axial pushing movement as is discussed in greater detail herein.
- the expansion sleeve 400 includes a clamping portion 403 .
- the clamping portion 403 is positioned to translate the axial movements into a clamping force by deflecting the collet 500 into the collet adapter 600 , as is discussed in greater detail herein.
- the expansion sleeve 400 is disposed partially inside the collet 500 to impart forces from a position inside the collet 500 .
- the expansion sleeve 400 includes one or more back slots 411 and one or more front slots 412 so that the diameter of the expansion sleeve is flexible.
- the slots 411 and 412 define axial legs 413 ( 413 A, 413 B, 413 C, and 413 D in FIG.
- the expansion sleeve 400 includes a plurality of front axial legs 413 ( 413 A, 413 B, 413 C, and 413 D in FIG. 8 ). In one embodiment, the expansion sleeve 400 includes two front axial legs 413 . In one embodiment, the expansion sleeve 400 includes five axial front legs 413 . In one embodiment, the expansion sleeve 400 includes at least three front axial legs 413 . The expansion sleeve 400 also includes a plurality of back axial legs 414 ( 414 A, 414 B, 414 C, and 414 D in FIG. 8 ).
- the expansion sleeve 400 includes two back axial legs 414 . In one embodiment, the expansion sleeve 400 includes five axial back legs 414 . In one embodiment, the expansion sleeve 400 includes at least three back axial legs 414 .
- the collet 500 is sized and configured to hold and position a workpiece in the clamping assembly 100 via collet clamping diameter 510 defined by an inner surface 510 X of a tool holding portion 510 Y that extends from a front end 551 of the collet towards the first end face 501 of the collet 500 , as shown in FIG. 10 .
- Collet 500 includes collet slots 518 so that the collet is flexible enough to collapse radially when applying the clamping force to the workpiece.
- the collet 500 includes a first end face 501 positioned to interface with the flange extraction face 404 .
- the flange extraction face 404 acts to detach the collet 500 by abutting the first end face 501 . This force and movement result in detachment of the first collet clamping taper 507 from the adapter clamping taper 609 , enabling easier removal of the collet 500 .
- the collet 500 includes an exterior surface including first collet lead-in taper 502 , a first collet lead-in diameter 503 , a collet lead-in groove 504 , and a second collet lead-in diameter 505 , which are sized and configured to make it easier to load the collet 500 into the collet adapter 600 and over the expansion sleeve 400 .
- the second collet lead-in diameter 505 also provides alignment of the collet rotation axis with the rotation axis of the collet adapter if there is an angular deviation in between both, and helps keep the collet 500 concentric with the collet adapter 600 during installation of the collet.
- the exterior surface of collet 500 also includes a collet guiding diameter 506 and a first collet clamping taper 507 .
- the first collet clamping taper 507 is located on the tool holding portion 510 Y of the collet and further acts to center the collet 500 within the collet adapter 600 .
- Deflection of the collet guiding diameter 506 is the result of axial movement the clamping portion 403 along the interior surface of the collet 500 .
- the interior surface of the collet 500 includes first collet internal diameter 512 , a second collet clamping taper 513 , a second collet internal diameter 514 , a second collet lead-in taper 515 , and a third collet lead-in diameter 516 .
- the first collet internal diameter 512 , second collet internal diameter 514 , and third collet lead-in diameter 516 help maintain concentricity between the collet 500 .
- the second collet lead-in taper 515 eases installation of the collet 500 over the expansion sleeve 400 via interaction with sleeve lead-in taper 410 . As shown in FIG.
- the collet 500 includes a collet extraction groove 509 that extends circumferentially around the exterior surface of the collet 500 at the terminus of the first collet clamping taper 507 .
- the collet extraction groove 509 is bounded by a radial collet wall 509 W on a side adjacent to the first collet clamping taper 507 and by a radially extending lip 509 L that is opposite the collet wall 509 W.
- the lip 509 L has an axial collet stop face 517 that faces towards the front end 551 of the collet.
- a radial force is exerted on the collet 500 which radially deflects the exterior surface of the collet 500 .
- This radial force pushes the exterior surface of the collet 500 , such as the collet guiding diameter 506 , into the interior surface of the collet adapter 600 , and clamps the collet 500 in place.
- the collet 500 includes an orientation keyway 511 configured to align with the orientation pin 608 from the collet adapter 600 .
- the orientation keyway 511 includes a lead-in angle 519 (see FIG. 9 ) making it easier to align the orientation keyway 511 with the orientation pin 608 .
- some embodiments of the present disclosure are directed to a collet extraction tool 700 allowing extraction of the collet 500 from the collet adaptor 600 .
- the collet extraction tool 700 extends from a collet engagement end 700 A to a gripping end 700 B and is coaxial with the axis A.
- the collet extraction tool 700 is shown having three latches 701 for gripping the collet 500 .
- Each of the latches 701 includes a circumferential groove 701 G extending at least partially around an inner surface of the collet extraction tool 700 .
- the circumferential groove 701 G is bounded at the engagement end 700 A of the collet extraction tool 700 by a circumferentially extending lip 701 L on each of the latches 701 .
- the circumferential groove 701 G is positioned and sized to interact with the collet extraction groove 509 and receive the lip 509 L on the collet extraction groove 509 .
- the circumferential groove 701 G is bounded on a side opposite the lip 701 L by an axial land 702 which is included to engage a portion of collet 500 .
- the axial land 702 interfaces with the collet stop face 517 on the collet 500 , thus limiting axial movement of the collet extraction tool 700 when applied to the collet 500 .
- the collet 500 includes an orientation keyway 508 to orient the collet extraction tool 700 on the collet 500 in similar fashion to orientation keyway 511 for orienting the collet 500 and the collet adapter 600 .
- the body of the collet extraction tool 700 is a castellated tube having a bore 705 and including three legs 703 L extending from a ring 703 R. Each of the legs 703 L are separated by a slot 703 , which makes the collet extraction tool 700 flexible enough to expand and contract radially, such as when engaging and disengaging from the collet 500 .
- the collet extraction tool 700 includes one or more handles 704 making it easier to hold and manipulate the collet extraction tool 700 .
- the clamping assembly 100 is in an unclamped position.
- the draw bar 200 displaces the draw pin 300 in the direction of the arrow Q 1 .
- the axial legs 413 A, 413 B, 413 C and 413 D of the expansion sleeve 400 are in a relaxed state and can be collapsed radially inward by the collet 500 in the direction of the arrows F 1 into the draw pin groove 304 .
- the draw bar end face 203 abuts the second axial end 408 of the expansion sleeve 400 and there is an axial gap D 11 between first end 401 of the expansion sleeve 400 and the draw pin stop axial face 307 .
- the clamping portion 403 of the expansion sleeve 400 is not engaged with the clamping taper 513 of the collet 500 and the collet 500 can be removed from the collet adapter 600 .
- the circumferential shoulder 306 of the draw pin 300 is not engaged with the guiding diameter 402 of the expansion sleeve 400 .
- the clamping assembly 100 is in a clamped position.
- the draw bar 200 displaces the draw pin 300 in the direction of the arrow Q 2 .
- the axial legs 413 A, 413 B, 413 C and 413 D of the expansion sleeve 400 are in an expanded state and are extended radially outward in the direction of the arrows F 2 away from the groove 304 .
- the draw bar end face 203 is spaced apart from the second axial end 408 of the expansion sleeve 400 by an axial gap D 10 and the first end 401 of the expansion sleeve 400 and the draw pin stop axial face 307 are abutted against each other.
- the clamping portion 403 of the expansion sleeve 400 is engaged with the clamping taper 513 of the collet 500 and the collet 500 is itself expanded. Expansion of the collet 500 by the clamping force eliminates the small gap between the collet guiding diameter 506 and adapter guiding diameter 606 , securing the collet 500 in the collet adapter 600 . This reduces dispersion of run-out and also centers more precisely the collet 500 in the clamped position.
- the circumferential shoulder 306 of the draw pin 300 is seated on the guiding diameter 402 of the expansion sleeve 400 to retain the axial legs 413 A, 413 B, 413 C and 413 D in the expanded state.
- Removing the collet 500 from clamping assembly 100 includes pushing draw bar 200 forward through the collet adapter 600 and towards the collet loading end 600 C.
- the draw bar 200 moves the draw pin 300 with it.
- the draw bar end face 203 is once again brought into abutting contact with second axial end 408 , thus displacing the expansion sleeve 400 .
- the circumferential tab 406 is displaced in the circumferential groove 603 .
- the clamping assembly 100 allows for quick manual and/or automatic change-out or attachment out of collets 500 .
- Table 1 provides a listing and description of element numbers including function and contact configuration.
- column 1 identifies the element number that is employed on one or more of FIGS. 1-11B ;
- column 2 provides a description of the element number;
- column 3 identifies the functionality or purpose for the particular element;
- column 4 describes the clamping situation during which the element is employed, including extracting the collet 500 , the clamped position (e.g., FIG. 11B ), the unclamped position (e.g., FIG. 11A ), and the empty configuration with the collet 500 removed from the collet adapter 600 (e.g., FIG. 6 );
- column 5 identifies the contact type the element has with a mating component, including, bearing contact, fixed contact, guiding contact and a free arrangement with no contact; and
- column 6 identifies other element number which the element identified in column 1 contacts or interfaces with.
- Clamped Bearing 302 Pushes against the expansion sleeve 400 to Unclamped Bearing 302/408 liberate the collet when unclamping Empty cl.
- Bearing 302 204 Draw bar hex Hex for tightening the draw bar 200 on the all free — pulling device 300
- Draw pin Transmit clamping force and a part of the axial — — — movement to the expansion sleeve 301
- Draw pin coupling Joining the draw bar 200 to the draw pin 300 all fixed 202 portion 302
- First draw pin stop Gives the axial position to the draw pin 300 all bearing 203 face according to the draw bar 200 303
- This diameter prevents the expansion sleeve 400 from collapsing at the first end and prevents it from leaving the groove in the collet adapter.
- the expansion sleeve can collapse radially inward at the second end and glide forwards. In this way, the expansion sleeve 400 can be taken out of the collet adapter 600.
- Draw pin groove Allows the expansion sleeve to collapse at the all free — first end while extracting or loading a collet 500.
- Draw pin taper Opens up the expansion sleeve 400 at the first all free — end while making the clamping or empty clamping movement.
- the expansion sleeve 400 When putting in the expansion sleeve 400 in the adapter 600, the expansion sleeve 400 collapses radially inward before gliding in the groove. Because the clamping force is transmitted over a taper, the clamping force will expand the collet 500 to eliminate the small gap between the guiding diameter of the collet 500 and the collet adapter 600. This reduces dispersion of run-out and centers more precisely the collet 500 in clamped position. 401 First sleeve end Transmit clamping force and a part of the axial Extracting free — face movement from the draw pin 200.
- Clamped bearing 307 Unclamped free — Empty bearing 307 402 First sleeve Guiding and centering the draw pin 200 while Extracting free — guiding diameter clamping the collet 500.
- the draw Unclamped free — pin 300 prevents the expansion sleeve 500 from Empty guiding 306 collapsing at the first end in clamped and empty clamped position.
- Sleeve clamping Transmit clamping force and a part of the axial Extracting free — taper movements to the collet 500.
- the Unclamped free — clamping force will expand the collet 500 to Empty free — eliminate the small gap between the guiding diameter of the collet 500 and the collet adapter 600. This reduces dispersion of run-out and centers more precisely the collet 500 in clamped position.
- 404 Flange extraction Transmit unclamping force and movement to the Extracting free — face collet 500.
- the Flange extraction face 404 Clamped free detaches the first collet clamping taper from the Unclamped bearing 501 adapter clamping taper when unclamping the Empty free — collet.
- Flange stop taper Stops the axial movement of the expansion Extracting bearing 604 sleeve 400 when unclamping and extracting the Clamped free — collet.
- the expansion sleeve 400 can glide Empty free — forward and collapse radially inward at the second end by following the groove stop taper. In this way, the expansion sleeve 400 can be taken out of the collet adapter 600.
- 406 Flange guiding Pre-centering (with gap) the expansion sleeve all guiding 603 diameter or tab 400 in the collet adapter 600. Prevents the expansion sleeve 400 from expanding in over its nominal radial dimension.
- 406H Height of tab 406 Prevents the expansion sleeve 400 from expanding over its nominal radial dimension.
- 406L Length of tab 406 Limits and establishes axial movement of the expansion sleeve 400 in the collet adapter 600.
- 407 Flange stop face Stops axial movement in empty clamping Extracting free — position and protects the collet 500 from damage.
- Clamped free — Unclamped free — Empty bearing 602 408 Second sleeve end Transmit the unclamping force and a part of the Extracting Bearing 203 face axial movement from the draw bar 200.
- the second sleeve end face 408 is used to detach Unclamped Bearing 203 the first collet clamping taper from the adapter Empty free — clamping taper when unclamping the collet. 409 Second sleeve Guidance and centering of the expansion sleeve all guiding 303 guiding diameter 400 on the draw pin 300. This diameter prevents the expansion sleeve 400 from collapsing at the first end and prevents it from leaving the groove in the collet adapter. When the draw pin 300 is taken out of the dmw bar 200, the expansion sleeve 400 can collapse radially inward at the second end and glide forward.
- 413B 413C 413D 414A Legs back sleeve Extend outwardly to allow draw pin 300 to enter 414B and the contracted assembly to releasably contain 414C the expansion sleeve 400.
- 414D 500 collet Transform the axial clamping force and — — — movement from the pulling device in a radial clamping force and movement, clamping a work- piece. Center the work piece according to the rotation axis of the machine spindle.
- 501 Collet end face Transmit unclamping force and movement from Extracting free — the expansion sleeve 400 to the collet.
- Collet lead-in Makes it easier to load the collet 500 in the collet all free — groove adapter 600. Prevents the collet 500 from sticking in the collet adapter lead-in diameter if there is an angular deviation between the rotation axis of the collet adapter 600 and the collet 500.
- Second collet Makes it easier to load the collet 500 in the collet all free — lead-in diameter adapter 600. Alignment of the collet rotation axis with the rotation axis of the collet adapter 600 if there is an angular deviation in between both.
- the gap is eliminated through the clamping force in clamped position, because the axial clamping force is decomposed over the second collet clamping taper (513) in an axial and a radial force component.
- the radial force component expands the collet guiding diameter radially while clamping the collet. This increases centering precision and makes run out dispersion smaller.
- 507 First collet Centers the collet 500 according to the collet Extracting free — clamping taper adapter 600. Clamped bearing 609 Unclamped free — Empty free — 508 First collet Allows optionally to orientate the collet 500 in Extracting Free — orientation the extractor 700.
- Clamped free — keyway Unclamped free — Empty free — 509 Collet extraction Transmits the extracting movement from the Extracting bearing 701 groove extractor 700 to the collet 500.
- Unclamped guiding 608 Empty free — 512 First collet internal Pre-centering (with gap) the draw pin 300 in the all free — diameter collet 500 in unclamped position. 513 Second collet Transmit clamping force and a part of the axial Extracting free — clamping taper movements from the expansion sleeve 400. Clamped bearing 403 Because the clamping force is transmitted over a Unclamped free — taper, the clamping force will expand the collet Empty free — what eliminates the small gap between the guiding diameter of the collet and the collet adapter. This reduces dispersion of run-out and centers more precisely the collet in clamped position.
- Unclamped free — Empty bearing 407 603 Groove diameter Pre-centering (with gap) the expansion sleeve all guiding 406 400 in the collet adapter.
- the expansion sleeve 400 Prevents the expansion sleeve 400 to expand over its nominal radial dimension
- 603D Depth of groove Prevents the expansion sleeve 400 to expand 603 over its nominal radial dimension.
- 603L Axial length of Limits and establishes axial movement of the groove 603 expansion sleeve in the collet adapter 600.
- 604 Groove stop taper Stops the axial movement of the expansion Extracting bearing 405 sleeve when unclamping and extracting the Clamped free — collet. When the draw pin is taken out of the Unclamped bearing 405 draw bar, the expansion sleeve 400 can glide Empty free — forwards and collapse radially at the second end by following the groove stop taper.
- the expansion sleeve 400 can be taken out of the collet adapter.
- 605 Adapter mounting Joining the collet adapter 600 to the machine all fixed Machine portion spindle.
- Unclamped guiding 506 There is still a very small gap in Unclamped guiding 506 between this two diameters characteristic for all Empty free — draw-in collets with cylindrical shank. If the collet is drawn back at its back end, this gap gets bigger because the collet guiding diameter constricts as a result of the axial pulling force.
- the gap is eliminated through the clamping force in clamped position, because the axial clamping force is decomposed over the second collet clamping taper (513) in an axial and a radial force component.
- the radial force component expands the collet guiding diameter radially while clamping the collet 500. This increases centering precision and makes run out dispersion smaller.
- 607 Adapter lead-in Makes it easier to load the collet 500, prevents all free — taper frontal collision between the collet 500 and the collet adapter 600 while loading the collet 500.
- 702 Extractor end stop Makes it easier to push the extractor on the all free — collet. Stops the axial movement when pushing the extractor on the collet 500.
- 703 Extractor slot Makes the extractor flexible enough to expand all free — radially when pushing the extractor on the collet 500.
- 703L Extraction tool Flexible legs separated by the slots 703 for legs releasably grasping the collet 500.
- 703R Ring portion of Continuous ring holds the legs 703L together as extraction tool one unitary piece.
- 704 handle Place to hold manually the extractor 700.
- all free — 705 Extractor through Makes the extractor flexible enough to expand all free — bore radially when pushing the extractor 700 on the collet 500. Allows to push the extractor 700 over the collet nose.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Gripping On Spindles (AREA)
Abstract
Description
TABLE 1 | ||||||
1 | 4 | 6 | ||||
Element | 2 | 3 | Clamping | 5 | Other element | |
No. | Description | Functionality | situation | Contact type | number | |
A | Longitudinal | Reference line | ||||
100 | Manual and/or | Provides for quick change out of a collet | — | — | — | |
automatic quick- | ||||||
|
||||||
200 | Draw bar | Transmit clamping force and axial movement | — | — | — | |
from the pulling device (not shown) to the | ||||||
pin | ||||||
201 | Draw bar | Joining the draw bar to the pulling device | all | fixed | Pulling device | |
mounting portion | (not shown) | |||||
202 | Draw bar coupling | Joining the draw bar to the |
all | fixed | 301 | |
|
||||||
203 | Draw bar end face | Gives the axial position to the draw | Extracting | Bearing | 302/408 | |
according to the drawbar. | Clamped | |
302 | |||
Pushes against the |
| Bearing | 302/408 | |||
liberate the collet when unclamping | Empty cl. | Bearing | 302 | |||
204 | Draw bar hex | Hex for tightening the |
all | free | — | |
pulling |
||||||
300 | Draw pin | Transmit clamping force and a part of the axial | — | — | — | |
movement to the |
||||||
301 | Draw pin coupling | Joining the |
all | fixed | 202 | |
|
||||||
302 | First draw pin stop | Gives the axial position to the |
all | bearing | 203 | |
face | according to the |
|||||
303 | First draw pin | Guidance and centering of the expansion sleeve | all | guiding | 409 | |
guiding |
400 on the draw pin. This diameter prevents the | |||||
|
||||||
end and prevents it from leaving the groove in | ||||||
the collet adapter. When the |
||||||
taken out of the |
||||||
sleeve can collapse radially inward at the second | ||||||
end and glide forwards. In this way, the | ||||||
|
||||||
|
||||||
304 | Draw pin groove | Allows the expansion sleeve to collapse at the | all | free | — | |
first end while extracting or loading a |
||||||
305 | Draw pin taper | Opens up the |
all | free | — | |
end while making the clamping or empty | ||||||
clamping movement. | ||||||
306 | Second draw pin | Guiding and centering the |
Extracting | free | — | |
guiding diameter | clamping the |
Clamped | guiding | 402 | ||
|
Unclamped | free | — | |||
clamped and empty clamped position | Empty | guiding | 402 | |||
307 | Second draw pin | Transmit clamping force and a part of the axial | Extracting | free | — | |
stop face | movement to the |
Clamped | bearing | 401 | ||
Unclamped | free | — | ||||
| bearing | 401 | ||||
308 | Third draw pin | Pre-centering (with gap) the |
all | free | — | |
guiding | collet | 500 in |
||||
309 | Draw pin | Hexagonal bore for tightening the |
all | free | — | |
hexagonal bore | on the |
|||||
310 | Draw pin thread | Allows optionally to fix an end stop for the work | all | free | — | |
piece if needed. | ||||||
311 | Draw pin end face | Allows optionally to eject the work piece if | all | free | — | |
needed. | ||||||
400 | Expansion sleeve | Transmit clamping force and a part of the axial | — | — | — | |
movements to the |
||||||
element collapses on the first end when entering | ||||||
or extracting the collet. When putting in the | ||||||
|
||||||
|
||||||
before gliding in the groove. Because the | ||||||
clamping force is transmitted over a taper, the | ||||||
clamping force will expand the |
||||||
eliminate the small gap between the guiding | ||||||
diameter of the |
||||||
600. This reduces dispersion of run-out and | ||||||
centers more precisely the |
||||||
position. | ||||||
401 | First sleeve end | Transmit clamping force and a part of the axial | Extracting | free | — | |
face | movement from the |
Clamped | bearing | 307 | ||
Unclamped | free | — | ||||
| bearing | 307 | ||||
402 | First sleeve | Guiding and centering the |
Extracting | free | — | |
guiding diameter | clamping the |
Clamped | guiding | 306 | ||
by the first |
Unclamped | free | — | |||
|
Empty | guiding | 306 | |||
collapsing at the first end in clamped and empty | ||||||
clamped position. | ||||||
403 | Sleeve clamping | Transmit clamping force and a part of the axial | Extracting | free | — | |
taper | movements to the |
Clamped | |
513 | ||
clamping force is transmitted over a taper, the | Unclamped | free | — | |||
clamping force will expand the |
Empty | free | — | |||
eliminate the small gap between the guiding | ||||||
diameter of the |
||||||
600. This reduces dispersion of run-out and | ||||||
centers more precisely the |
||||||
position. | ||||||
404 | Flange extraction | Transmit unclamping force and movement to the | Extracting | free | — | |
| collet | 500. The |
Clamped | free | — | |
detaches the first collet clamping taper from the | Unclamped | bearing | 501 | |||
adapter clamping taper when unclamping the | Empty | free | — | |||
collet. | ||||||
405 | Flange stop taper | Stops the axial movement of the | Extracting | bearing | 604 | |
|
Clamped | free | — | |||
collet. When the |
Unclamped | bearing | 604 | |||
|
Empty | free | — | |||
forward and collapse radially inward at the | ||||||
second end by following the groove stop taper. In | ||||||
this way, the |
||||||
out of the |
||||||
406 | Flange guiding | Pre-centering (with gap) the expansion sleeve | all | guiding | 603 | |
diameter or |
400 in the |
|||||
|
||||||
nominal radial dimension. | ||||||
406H | Height of |
Prevents the |
||||
expanding over its nominal radial dimension. | ||||||
406L | Length of |
Limits and establishes axial movement of the | ||||
|
||||||
407 | Flange stop face | Stops axial movement in empty clamping | Extracting | free | — | |
position and protects the |
Clamped | free | — | |||
Unclamped | free | — | ||||
| bearing | 602 | ||||
408 | Second sleeve end | Transmit the unclamping force and a part of the | Extracting | |
203 | |
face | axial movement from the |
Clamped | free | — | ||
The second |
| Bearing | 203 | |||
the first collet clamping taper from the adapter | Empty | free | — | |||
clamping taper when unclamping the collet. | ||||||
409 | Second sleeve | Guidance and centering of the expansion sleeve | all | guiding | 303 | |
guiding |
400 on the |
|||||
the |
||||||
first end and prevents it from leaving the groove | ||||||
in the collet adapter. When the |
||||||
taken out of the | ||||||
sleeve | ||||||
400 can collapse radially inward at the | ||||||
second end and glide forward. In this way, the | ||||||
|
||||||
collet adapter. | ||||||
410 | Sleeve lead-in | Makes it easier to load the collet, prevents frontal | all | free | — | |
taper | collision between the collet and the | |||||
sleeve | ||||||
400 while loading the collet | ||||||
Closes the |
||||||
in contact with the second collet lead-in taper | ||||||
(515) when loading the |
||||||
411 | Sleeve back slots | Makes the |
all | free | — | |
to collapse radially at the second end when put in | ||||||
or take out the expansion sleeve 400 (assembly | ||||||
without draw pin) | ||||||
412 | Sleeve front slots | Makes the |
all | free | — | |
to collapse radially at the first end, when loading | ||||||
or extracting the |
||||||
413A | Legs front sleeve | Extend outwardly to clamp |
||||
| ||||||
413C | ||||||
413D | ||||||
414A | Legs back sleeve | Extend outwardly to allow |
||||
414B | and the contracted assembly to releasably contain | |||||
414C | the |
|||||
|
||||||
500 | collet | Transform the axial clamping force and | — | — | — | |
movement from the pulling device in a radial | ||||||
clamping force and movement, clamping a work- | ||||||
piece. Center the work piece according to the | ||||||
rotation axis of the machine spindle. | ||||||
501 | Collet end face | Transmit unclamping force and movement from | Extracting | free | — | |
the |
Clamped | free | — | |||
and this movement detach the first collet | Unclamped | bearing | 404 | |||
clamping taper from the adapter clamping taper | Empty | free | — | |||
when unclamping the collet. | ||||||
502 | First collet lead-in | Makes it easier to load the |
all | free | — | |
taper | frontal collision between the |
|||||
|
||||||
the |
||||||
503 | First collet lead-in | Makes it easier to load the |
all | free | — | |
diameter | centering (with gap) the |
|||||
adapter lead-in diameter and second in the | ||||||
adapter guiding diameter while loading the |
||||||
500 in the |
||||||
504 | Collet lead-in | Makes it easier to load the |
all | free | — | |
| adapter | 600. Prevents the |
||||
sticking in the collet adapter lead-in diameter if | ||||||
there is an angular deviation between the rotation | ||||||
axis of the |
||||||
505 | Second collet | Makes it easier to load the |
all | free | — | |
lead-in | adapter | 600. Alignment of the collet rotation axis | ||||
with the rotation axis of the |
||||||
there is an angular deviation in between both. | ||||||
Pre-centering (with gap) the collet first in the | ||||||
adapter lead-in diameter and second in the | ||||||
adapter guiding diameter while loading the | ||||||
collet. | ||||||
506 | Collet guiding | Centers the |
Extracting | free | — | |
diameter | adapter guiding diameter in clamped and | Clamped | guiding | 606 | ||
unclamped position. There is still a very small | Unclamped | guiding | 606 | |||
gap in between these two diameters, | Empty | free | — | |||
characteristic for all draw-in collets with | ||||||
cylindrical shank. If the collet is drawn back at | ||||||
its back end, this gap gets bigger because the | ||||||
collet guiding diameter constricts as a result of | ||||||
the axial pulling force. In this invention, the gap | ||||||
is eliminated through the clamping force in | ||||||
clamped position, because the axial clamping | ||||||
force is decomposed over the second collet | ||||||
clamping taper (513) in an axial and a radial | ||||||
force component. The radial force component | ||||||
expands the collet guiding diameter radially | ||||||
while clamping the collet. This increases | ||||||
centering precision and makes run out dispersion | ||||||
smaller. | ||||||
507 | First collet | Centers the |
Extracting | free | — | |
clamping | adapter | 600. | Clamped | bearing | 609 | |
Unclamped | free | — | ||||
Empty | free | — | ||||
508 | First collet | Allows optionally to orientate the |
Extracting | Free | — | |
orientation | the |
Clamped | free | — | ||
keyway | Unclamped | free | — | |||
Empty | free | — | ||||
509 | Collet extraction | Transmits the extracting movement from the | Extracting | bearing | 701 | |
| extractor | 700 to the |
Clamped | free | — | |
Unclamped | free | — | ||||
Empty | free | — | ||||
509L | Circumferential | Seats in the |
||||
lip of the |
700. | |||||
510 | Collet clamping | Centers and holds the workpiece | Extracting | free | — | |
diameter | Clamped | bearing | Workpiece | |||
Unclamped | free | — | ||||
Empty | free | — | ||||
511 | Second collet | Orientation of the |
Extracting | free | — | |
|
600, prevents the collet from rotating between | Clamped | guiding | 608 | ||
keyway | different clamping/unclamping cycles. | Unclamped | guiding | 608 | ||
Empty | free | — | ||||
512 | First collet internal | Pre-centering (with gap) the |
all | free | — | |
| collet | 500 in unclamped position. | ||||
513 | Second collet | Transmit clamping force and a part of the axial | Extracting | free | — | |
clamping taper | movements from the |
Clamped | bearing | 403 | ||
Because the clamping force is transmitted over a | Unclamped | free | — | |||
taper, the clamping force will expand the collet | Empty | free | — | |||
what eliminates the small gap between the | ||||||
guiding diameter of the collet and the collet | ||||||
adapter. This reduces dispersion of run-out and | ||||||
centers more precisely the collet in clamped | ||||||
position. | ||||||
514 | Second collet | Pre-centering (with gap) the draw pin in the | all | free | — | |
internal diameter | collet when loading the |
|||||
515 | Second collet | Closes the |
all | free | — | |
lead-in taper | in contact with the sleeve lead-in taper (410) | |||||
when loading the |
||||||
516 | Third collet lead- | Pre-centering (with gap) the expansion sleeve | all | free | — | |
in |
400 in the collet when loading the |
|||||
517 | Collet stop face | Makes it easier to push the |
all | free | — | |
|
||||||
pushing the |
||||||
518 | Collet slot | Makes the |
all | free | — | |
radially when applying the clamping force. | ||||||
519 | Key way lead-in | Makes it easier to load the |
all | free | — | |
angle | turns the collet when there is a misalignment | |||||
between the second collet orientation keyway | ||||||
(511) and the orientation pin (608). | ||||||
600 | Collet adapter | Main body, joining the |
all | free | — | |
spindle. This part also keeps the | ||||||
sleeve | ||||||
400 at its predetermined position. | ||||||
600A | draw bar receiving | Portion of collet adapter to receive |
||||
end of | ||||||
adapter | ||||||
600B | Through bore of | Cylindrical bore extending through collet | ||||
collet adapter | ||||||
600. | ||||||
600C | collet loading end | Portion of |
||||
of collet adapter | loading the |
|||||
601 | First adapter | Pre-centering (with great gap) the |
all | free | — | |
guiding diameter | in the |
|||||
602 | Groove stop face | Stops axial movement in empty clamping | Extracting | free | — | |
position and prevents the |
Clamped | free | — | |||
damaged. | Unclamped | free | — | |||
| bearing | 407 | ||||
603 | Groove diameter | Pre-centering (with gap) the expansion sleeve | all | guiding | 406 | |
400 in the collet adapter. Prevents the | ||||||
sleeve | ||||||
400 to expand over its nominal radial | ||||||
dimension, | ||||||
603D | Depth of groove | Prevents the |
||||
603 | over its nominal radial dimension. | |||||
603L | Axial length of | Limits and establishes axial movement of the | ||||
|
expansion sleeve in the |
|||||
604 | Groove stop taper | Stops the axial movement of the | Extracting | bearing | 405 | |
sleeve when unclamping and extracting the | Clamped | free | — | |||
collet. When the draw pin is taken out of the | Unclamped | bearing | 405 | |||
draw bar, the |
Empty | free | — | |||
forwards and collapse radially at the second end | ||||||
by following the groove stop taper. In this way, | ||||||
the |
||||||
collet adapter. | ||||||
605 | Adapter mounting | Joining the |
all | fixed | Machine | |
portion | spindle. | |
||||
606 | Adapter guiding | Centers the |
Extracting | free | — | |
diameter | guiding diameter in clamped and unclamped | Clamped | guiding | 506 | ||
position. There is still a very small gap in | Unclamped | guiding | 506 | |||
between this two diameters characteristic for all | Empty | free | — | |||
draw-in collets with cylindrical shank. If the | ||||||
collet is drawn back at its back end, this gap gets | ||||||
bigger because the collet guiding diameter | ||||||
constricts as a result of the axial pulling force. In | ||||||
this invention, the gap is eliminated through the | ||||||
clamping force in clamped position, because the | ||||||
axial clamping force is decomposed over the | ||||||
second collet clamping taper (513) in an axial | ||||||
and a radial force component. The radial force | ||||||
component expands the collet guiding diameter | ||||||
radially while clamping the |
||||||
increases centering precision and makes run out | ||||||
dispersion smaller. | ||||||
607 | Adapter lead-in | Makes it easier to load the |
all | free | — | |
taper | frontal collision between the |
|||||
|
||||||
608 | Orientation pin | Orientation of the |
Extracting | free | — | |
600, prevents the |
Clamped | guiding | 511 | |||
between different clamping/unclamping cycles. | Unclamped | guiding | 511 | |||
Empty | free | — | ||||
609 | Adapter clamping | Centers the |
Extracting | free | — | |
| adapter | 600. Transforms the axial clamping force | Clamped | bearing | 507 | |
from the pulling device in a radial clamping | Unclamped | free | — | |||
force to hold the work piece. | Empty | free | — | |||
610 | Adapter lead-in | Makes it easier to load the |
all | free | — | |
diameter | centering (with gap) the |
|||||
first collet lead-in diameter, then on the second | ||||||
collet lead-in diameter and finally, with a smaller | ||||||
gap, on the collet guiding diameter. | ||||||
700 | Collet extractor or | This part allows to extract the collet form the | — | — | — | |
collet extraction | collet adapter. | |||||
tool. | ||||||
701 | Extractor nose | Transmits the extracting movement from the | Extracting | |
509 | |
extractor to the |
Clamped | free | — | |||
Unclamped | free | — | ||||
Empty | free | — | ||||
701G | Circumferential | Formed in an inner surface of the extraction tool | ||||
groove | tube for receiving the |
|||||
702 | Extractor end stop | Makes it easier to push the extractor on the | all | free | — | |
collet. Stops the axial movement when pushing | ||||||
the extractor on the |
||||||
703 | Extractor slot | Makes the extractor flexible enough to expand | all | free | — | |
radially when pushing the extractor on the |
||||||
500. | ||||||
703L | Extraction tool | Flexible legs separated by the |
||||
legs | releasably grasping the |
|||||
703R | Ring portion of | Continuous ring holds the |
||||
extraction tool | one unitary piece. | |||||
704 | handle | Place to hold manually the |
all | free | — | |
705 | Extractor through | Makes the extractor flexible enough to expand | all | free | — | |
bore | radially when pushing the |
|||||
|
||||||
Allows to push the |
||||||
nose. | ||||||
Claims (18)
Priority Applications (1)
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US16/361,774 US11179783B2 (en) | 2018-03-29 | 2019-03-22 | Quick changeable collet clamping assembly |
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US201862649742P | 2018-03-29 | 2018-03-29 | |
US16/361,774 US11179783B2 (en) | 2018-03-29 | 2019-03-22 | Quick changeable collet clamping assembly |
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US20190299299A1 US20190299299A1 (en) | 2019-10-03 |
US11179783B2 true US11179783B2 (en) | 2021-11-23 |
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US20230375129A1 (en) * | 2022-05-23 | 2023-11-23 | Michael Nowling | Indicator Connection Adapter Device |
Citations (37)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2824744A (en) | 1956-03-09 | 1958-02-25 | Gleason Works | Flexible collet and chuck employing same |
US3104885A (en) | 1963-09-24 | Expanding collet for turret lathes and screw machines | ||
DE1263455B (en) | 1955-10-20 | 1968-03-14 | Woodworth Co N A | Jig |
FR2410206A1 (en) | 1977-11-26 | 1979-06-22 | Production Eng Res | DEVICE FOR EXTRACTING A TUBE FIXED ON A SUPPORT |
SU1219268A1 (en) | 1984-09-01 | 1986-03-23 | Предприятие П/Я А-3165 | Collet chuck |
US4580796A (en) | 1982-04-10 | 1986-04-08 | Albert Schrem Werkzeugfabrik Gmbh | Hydraulic clamping nut |
EP0179024A1 (en) * | 1984-10-18 | 1986-04-23 | Schäublin S.A. | Mounting device of a collet to clamp a piece in a machine tool |
US4928373A (en) | 1989-07-17 | 1990-05-29 | Kennametal Inc. | Collet tool |
US5326114A (en) | 1992-04-08 | 1994-07-05 | Cincinnati Milacron, Inc. | Quickly interchangeable chuck with mechanical power assist clamping capabilities |
US5383673A (en) * | 1993-08-03 | 1995-01-24 | Kennametal Inc. | Collet for a square-shank tap |
US6257595B1 (en) | 1998-09-04 | 2001-07-10 | Hardinge Inc. | Collect chuck with quick-change cap |
FR2806016B1 (en) | 2000-03-13 | 2002-06-28 | Sandvik Tobler | HIGH PRECISION EXPANDABLE CHUCK WITH CYLINDRICAL OR COMPENSATED TIGHTENING |
US20030052462A1 (en) * | 2001-09-18 | 2003-03-20 | Tsuyoshi Komine | Collet |
JP2004249445A (en) | 2003-02-21 | 2004-09-09 | Aisin Seiki Co Ltd | Taper collet puller |
JP2004276179A (en) | 2003-03-17 | 2004-10-07 | Daishowa Seiki Co Ltd | Collet removing device |
KR20050066714A (en) | 2003-12-27 | 2005-06-30 | 두산인프라코어 주식회사 | Spindle collet mechanism for hallow taper shank tool |
US20060097463A1 (en) | 2004-11-10 | 2006-05-11 | Hydra-Lock Corporation | Mechanically actuated workpiece holder including a plastic collet |
CN201086132Y (en) | 2007-09-12 | 2008-07-16 | 广州机床厂有限公司 | Lathe spindle unit |
EP1961507A2 (en) * | 2007-02-26 | 2008-08-27 | Röhm GmbH | Clamping device |
WO2009010037A1 (en) * | 2007-07-16 | 2009-01-22 | Röhm Gmbh | Tensioning device for a hollow shaft |
EP2130633A2 (en) * | 2008-06-04 | 2009-12-09 | Jtekt Corporation | Tool clamping device and tool clamping method |
CN101722339A (en) | 2009-12-14 | 2010-06-09 | 江苏飞船股份有限公司 | Gear milling positioning fixture for spiral bevel gear |
WO2011059945A1 (en) | 2009-11-10 | 2011-05-19 | The Gleason Works | Compensating workholding equipment |
US20110158759A1 (en) * | 2009-12-28 | 2011-06-30 | Wto Werkzeug-Einrichtungen Gmbh | Tool holder having a collet holder and a tool insert for use in a tool holder |
US7971883B2 (en) | 2005-09-07 | 2011-07-05 | Hardinge, Inc. | Workholding clamping assembly |
CN201940633U (en) | 2011-01-27 | 2011-08-24 | 保定标正机床有限责任公司 | Expansion-sleeve central spindle clamping device |
KR20130022903A (en) | 2011-08-26 | 2013-03-07 | 현대위아 주식회사 | Main shaft device for machine tool |
CN104384528A (en) | 2014-09-29 | 2015-03-04 | 阳山县联合铸锻有限公司 | Flange bearing metal cutting machining process and fixture for implementing process |
CN104416180A (en) | 2013-09-02 | 2015-03-18 | 瑞班有限公司 | Fixture |
JP5712838B2 (en) | 2011-07-22 | 2015-05-07 | 日本精工株式会社 | Spindle device |
JP5712840B2 (en) | 2011-07-22 | 2015-05-07 | 日本精工株式会社 | Motor built-in spindle device |
JP6185158B2 (en) | 2013-05-30 | 2017-08-23 | シャブリン ソシエテ・アノニムSchaublin Sa | Collet assembly |
US20170355024A1 (en) | 2016-06-14 | 2017-12-14 | Roller Bearing Company Of America, Inc. | Flexible coupling for attaching a collet to a draw bar |
WO2017215881A1 (en) | 2016-06-15 | 2017-12-21 | Cytec Zylindertechnik Gmbh | Clamping device |
US20180021745A1 (en) | 2016-07-22 | 2018-01-25 | Bison Gear & Engineering Corp. | Collet locking shaft assembly |
CN107755726A (en) | 2017-11-03 | 2018-03-06 | 南京泉峰汽车精密技术股份有限公司 | Suitable for the swelling fixture of cover parts |
EP3406377A1 (en) | 2017-05-09 | 2018-11-28 | Schaublin SA | Clamping device for holding a collet |
-
2019
- 2019-03-22 EP EP19164704.9A patent/EP3546098A1/en active Pending
- 2019-03-22 US US16/361,774 patent/US11179783B2/en active Active
- 2019-03-28 CN CN201910243814.0A patent/CN110315103A/en active Pending
Patent Citations (41)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3104885A (en) | 1963-09-24 | Expanding collet for turret lathes and screw machines | ||
DE1263455B (en) | 1955-10-20 | 1968-03-14 | Woodworth Co N A | Jig |
US2824744A (en) | 1956-03-09 | 1958-02-25 | Gleason Works | Flexible collet and chuck employing same |
FR2410206A1 (en) | 1977-11-26 | 1979-06-22 | Production Eng Res | DEVICE FOR EXTRACTING A TUBE FIXED ON A SUPPORT |
US4580796A (en) | 1982-04-10 | 1986-04-08 | Albert Schrem Werkzeugfabrik Gmbh | Hydraulic clamping nut |
SU1219268A1 (en) | 1984-09-01 | 1986-03-23 | Предприятие П/Я А-3165 | Collet chuck |
EP0179024A1 (en) * | 1984-10-18 | 1986-04-23 | Schäublin S.A. | Mounting device of a collet to clamp a piece in a machine tool |
KR950000813B1 (en) | 1989-07-17 | 1995-02-02 | 케나케탈, 아이엔씨 | Collet handling tool and excluding method |
US4928373A (en) | 1989-07-17 | 1990-05-29 | Kennametal Inc. | Collet tool |
US5326114A (en) | 1992-04-08 | 1994-07-05 | Cincinnati Milacron, Inc. | Quickly interchangeable chuck with mechanical power assist clamping capabilities |
EP0630716A1 (en) | 1992-04-08 | 1994-12-28 | Cincinnati Milacron Inc. | Interchangeable clamping chuck and method of clamping a workpiece |
US5383673A (en) * | 1993-08-03 | 1995-01-24 | Kennametal Inc. | Collet for a square-shank tap |
US6257595B1 (en) | 1998-09-04 | 2001-07-10 | Hardinge Inc. | Collect chuck with quick-change cap |
FR2806016B1 (en) | 2000-03-13 | 2002-06-28 | Sandvik Tobler | HIGH PRECISION EXPANDABLE CHUCK WITH CYLINDRICAL OR COMPENSATED TIGHTENING |
US20030052462A1 (en) * | 2001-09-18 | 2003-03-20 | Tsuyoshi Komine | Collet |
JP2004249445A (en) | 2003-02-21 | 2004-09-09 | Aisin Seiki Co Ltd | Taper collet puller |
JP2004276179A (en) | 2003-03-17 | 2004-10-07 | Daishowa Seiki Co Ltd | Collet removing device |
JP4311957B2 (en) | 2003-03-17 | 2009-08-12 | 大昭和精機株式会社 | Collet removal tool |
KR20050066714A (en) | 2003-12-27 | 2005-06-30 | 두산인프라코어 주식회사 | Spindle collet mechanism for hallow taper shank tool |
US20060097463A1 (en) | 2004-11-10 | 2006-05-11 | Hydra-Lock Corporation | Mechanically actuated workpiece holder including a plastic collet |
US7971883B2 (en) | 2005-09-07 | 2011-07-05 | Hardinge, Inc. | Workholding clamping assembly |
EP1961507A2 (en) * | 2007-02-26 | 2008-08-27 | Röhm GmbH | Clamping device |
WO2009010037A1 (en) * | 2007-07-16 | 2009-01-22 | Röhm Gmbh | Tensioning device for a hollow shaft |
CN201086132Y (en) | 2007-09-12 | 2008-07-16 | 广州机床厂有限公司 | Lathe spindle unit |
EP2130633A2 (en) * | 2008-06-04 | 2009-12-09 | Jtekt Corporation | Tool clamping device and tool clamping method |
US20090304474A1 (en) | 2008-06-04 | 2009-12-10 | Jtekt Corporation | Tool clamping device and tool clamping method |
WO2011059945A1 (en) | 2009-11-10 | 2011-05-19 | The Gleason Works | Compensating workholding equipment |
CN101722339A (en) | 2009-12-14 | 2010-06-09 | 江苏飞船股份有限公司 | Gear milling positioning fixture for spiral bevel gear |
US20110158759A1 (en) * | 2009-12-28 | 2011-06-30 | Wto Werkzeug-Einrichtungen Gmbh | Tool holder having a collet holder and a tool insert for use in a tool holder |
CN201940633U (en) | 2011-01-27 | 2011-08-24 | 保定标正机床有限责任公司 | Expansion-sleeve central spindle clamping device |
JP5712840B2 (en) | 2011-07-22 | 2015-05-07 | 日本精工株式会社 | Motor built-in spindle device |
JP5712838B2 (en) | 2011-07-22 | 2015-05-07 | 日本精工株式会社 | Spindle device |
KR20130022903A (en) | 2011-08-26 | 2013-03-07 | 현대위아 주식회사 | Main shaft device for machine tool |
JP6185158B2 (en) | 2013-05-30 | 2017-08-23 | シャブリン ソシエテ・アノニムSchaublin Sa | Collet assembly |
CN104416180A (en) | 2013-09-02 | 2015-03-18 | 瑞班有限公司 | Fixture |
CN104384528A (en) | 2014-09-29 | 2015-03-04 | 阳山县联合铸锻有限公司 | Flange bearing metal cutting machining process and fixture for implementing process |
US20170355024A1 (en) | 2016-06-14 | 2017-12-14 | Roller Bearing Company Of America, Inc. | Flexible coupling for attaching a collet to a draw bar |
WO2017215881A1 (en) | 2016-06-15 | 2017-12-21 | Cytec Zylindertechnik Gmbh | Clamping device |
US20180021745A1 (en) | 2016-07-22 | 2018-01-25 | Bison Gear & Engineering Corp. | Collet locking shaft assembly |
EP3406377A1 (en) | 2017-05-09 | 2018-11-28 | Schaublin SA | Clamping device for holding a collet |
CN107755726A (en) | 2017-11-03 | 2018-03-06 | 南京泉峰汽车精密技术股份有限公司 | Suitable for the swelling fixture of cover parts |
Non-Patent Citations (1)
Title |
---|
Extended European Search Report issued in corresponding EP Application No. 19164704.9, dated Aug. 16, 2019, pp. 1-8. |
Also Published As
Publication number | Publication date |
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EP3546098A1 (en) | 2019-10-02 |
CN110315103A (en) | 2019-10-11 |
US20190299299A1 (en) | 2019-10-03 |
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